抄録
Barley endosperms (expt. A) and their finders (expt. B) which were obtained by cutting off the endosperms into about eight pieces, were incubated with gibberellin. The conditions under which α-amylase was activated were studied.-Amylase activation was proved to show maximum at 30°C and pH 4.7 in the both cases. Activation by several salts was also found in the both cases, especially in expt. B. Sugar (sucrose) rather retarded this activation. In expt. B α-amylase activation was found to increase in accordance with increasing concentration of gibberellin. In expt. A maximum activation was observed at 1 ppm of gibberellin.
